Every classroom. Every period. Locked by default.
The simplest thing a school can do about an active shooter is already standard everywhere else: lock the door.
ClassLock turns classroom doors into credentialed doors. They open for the students and staff scheduled in that room, at that time, and stay locked to everyone else. No cameras. No AI watching your kids. No teacher stepping into a hallway with a key.
Built on UL 294 listed door controllers. Free egress from inside, always. Installed by your local door and access‑control contractors.
The gap nobody talks about
We harden the front door, then leave 40 unlocked doors inside.
Visitor vestibules, scanners, cameras and panic buttons all live at the perimeter or after the fact. Once someone is inside, every unlocked classroom is an open target, and the only thing between an attacker and a room full of children is whether a teacher managed to lock the door in time.
Today: the teacher is the lock
Most classroom locks still need a person to act. Doors get propped for convenience. Keys get lost. Under stress, people freeze. At Robb Elementary in Uvalde, the classroom door everyone assumed was locked was not.
Detection is not protection
AI weapons scanners and gun-detection cameras have missed real weapons in real schools, and even when they work, they only send an alert. Somebody still has to respond, and the doors are still open.
ClassLock: the door is the lock
Doors are secured from the hallway side all day. A student taps a badge or phone and walks in if the schedule says they belong there. Anyone else stays out. Inside, the lever always opens. Nothing to remember.
How it works
Your bell schedule becomes your access policy.
ClassLock reads rosters and the master schedule from the student information system your school already runs, such as PowerSchool, Infinite Campus or Skyward. Each door controller then knows exactly who is allowed through that door, in that period, on that day.
- Tap A student presents a school ID badge, phone or QR pass at the reader beside the door.
- Check The controller at the door checks the credential against the room's schedule. The decision is local and instant, even if the network is down.
- Enter The door unlocks for a few seconds, the student walks in, and it relocks behind them. Inside, the lever opens the door at any time, for anyone.
- Lockdown One button, from any phone or the office, holds every door secured and shows administrators and responders which rooms are actually closed.
Why this works when other things fail
Time, not technology, is what saves lives.
The pattern in the official investigations is consistent. At Marjory Stoneman Douglas the shooter never entered a single classroom. At Oxford High School he was unable to enter any classroom; the students killed were in a hallway and a bathroom. At Robb Elementary the door to room 111 was not locked, and all 21 people killed were inside rooms 111 and 112. A 2026 study of every U.S. K‑12 active shooter event since 2000 found that no lock was ever defeated; 62% of the doors attackers met were simply unlocked or propped.
ClassLock removes the human step. The door does not wait for someone to notice the threat, find the key, open the door, step into the hallway and lock it. It is already locked.
Illustrative. Timing sources are on the evidence page.
Compared with what schools are buying now
Cheaper. Quieter. Harder to fool.
| AI weapons scanners | Metal detectors | AI gun-detection cameras | ClassLock | |
|---|---|---|---|---|
| Physically stops an attacker | No | No | No | Yes, at every classroom |
| Works against a student already inside | No | No | Only if seen on camera | Yes |
| Works if someone uses a side door | No | No | Sometimes | Yes |
| Staff needed every morning | 2 to 4 per lane | 2 per lane | Monitoring | None |
| Slows student arrival | Yes, lines | Yes, lines | No | No |
| Watches or records students | Scans bodies and bags | Scans bodies | Continuous video + AI | No cameras, no AI |
| Works during a network or power outage | No | Needs power | No | Yes, fail‑secure, local decision |
Privacy by design
No cameras. No facial recognition. No algorithm guessing.
ClassLock records the same thing a key does: that a credential opened a door at a time. It does not film students, scan their bodies, or score their behavior. The data it needs already exists in the school's student information system, and it is governed by the same FERPA rules as the attendance book.
- Access decisions are made at the door controller, not in the cloud.
- Event logs stay with the district. Retention is configurable.
- No biometrics. Badges, phones or QR passes only.
Budget reality
A fraction of one scanner contract covers an entire wing.
Keep your doors
Most classroom doors already have a Grade 1 lever lock. ClassLock adds a reader, a fail‑secure electric strike, a door sensor and a controller. The door, frame and lever stay.
Local crews install it
Your existing door hardware or access‑control contractor installs and commissions ClassLock. We train and certify them. No proprietary installer network, no waiting list.
Grant eligible
Door locks and access control are named eligible expenses in federal school‑violence‑prevention grants and in most state school‑safety programs.
Pilot programs now enrolling
Start with one wing. Prove it in a drill. Expand with data.
A 10‑door pilot can be installed in days by a local crew. Your first lockdown drill produces a door‑by‑door report you can take to your board, your insurer and your families.